Cam-forming machine



April 21, l1925.

E. c. cooLElY GAM FORMING lMACHINE Filed Nov.A 15, 1922 2 sheets-sheet 1 April 21, '1925.

\ E.c.cooLEY CAM FORMING MACHINE Filed NOV. l5, 1922 2 Sheets-Sheet 2 'ATTORNEY Patented Apr. 21, 1925.

ELMER C. C-OOLEY, OF EASTWOOD, NEW YORK.

CAM-FORMING MACHINE.

Application filed November 13, 1922i Serial No. 600,632.

To all whom t may concern.'

Be it known that I, ELMER C. CooLnY, a citizen of the United States, and resident of Eastwood, in the county of Onondaga, in the State of New York, have invented new and useful Improvements in Cam-Forming Machines, of which the following, taken in connection with the accompanying drawings, is a full, clear7 and eXact-description.- y

This invention relates to a` cam forming machine in which the blank from which the cam is to be formed is clamped to a rotary work holder and the latter graduallyT moved radially toward or from the axis ot the cutter as the work holder is rotateda rJ'he main object` is to provide simple and eliicient means adjustable at will whereby the radial movement of the work holder may be synchronized with Y the rotary movement thereof and its relative speed of radial move-- nient, as compared with the speed of rotary n'iovement, varied to produce cams of difierent thro-w.

In other words, I have sought to effect this radial movement of the work holder relatively to the cutter through the medium of a screw operated nut which is slidable along separate ways one of which is adjustable at will to different. anglesrelatively to the other to cause the blank to be cut to the desired contour or throw as the work holder and screw are simultaneously rotated.` n

Other objects and uses relating to speciiic parts of the device will be brought o-ut in' the Yfollowing description.

In the drawings:

Figure l is a front elevation of a cam forming machine embodying the various features of my invention.

Figure 2 is a longitudinal vertical sectional view taken on line 2-2, Figure 1.

Figure 3 is a longitudinal sectional view of the detached rotary work holder.

Figure 4 is a. top plan of one end of the carriage and adjacent end of the work holder showing by Vdotted lines the blank from which the cam is to be formed and the adj acentend of a rotary cutter.

Figure 5 is an end view of the parts shown in Figure Figure 6 is a transverse vertical sectional View taken in the plane of line 6 6, Figure 2.

Figure 7 is a top plan of the' central portion of the carriage supporting base and the rotary adjustable turret and adjacent portion of the slide which is movable in guide ways in the turret and carriage7 portions of the slide and turret being shown in section while other portions of the slide and its actuating screw and portions of the work holder and cutter are shown by dotted lines.

The cam torn'iing machine as illustrated, comprises a supporting base 1 having on its upper side a lengthwise guide way -Q- of dove-'tailed cross section along and upon which is movable a carriage .3M having its lower side provided.withdove-tailed ribs and -lf for engaging opposite sidesof the guide way 2-. one of said guide ribs being adjustable by means of screws 5 to take up wear.

The upper portion of the carriage is provided with a lengthwise bearingin which is j ournaled a rotary sleeve -7- having one end' enlarged at -8- to engage the adjacentcnd of the bearing (5- forkhold ing the sleeve against endwise movement in one direction, the opposite end of said sleeve being reducedior receiving a worm Ygear il-which is keyed to said sleeve and engages the opposite end ot the bearing 6W to hold the sleeve against cndwise movement in the opposite direction.

The reduced cndoi the sleeve --7-' ein tends beyond the gear 9* and is threaded and engaged by a. nut-l0; for holding the gear against endwise displacement.

A clamping bolt -llis extended centrally through the sleeve -7- some distance beyond the opposite ends thereoi'and has one end adjacent the heat -C- of the sleeve provided with a conical enlargement 12- while its other end is threaded and engaged by a nut f-lfor drawing the L bolt end wise. p

A disk P-ltmis loosely mounted upon the bolt --ll between the conical enlargement MlQ- and head 8 of the sleeve 7- and is provided with radial ribs 415- engaging in notches -16- in the adjacent end tace or" the sleeve for holding the disk againstk turning movement relatively7 to the sleeve, the outer end tace oit' the sleeve being serrated at 17.- for rictional engagement with the adjacent end of the cam blank or work as A which is also engulfed by the conical enlargement 12h when the bolt is tightened to clamp the work to the sleeve and permit it to be rotated against a suitable rotary cutter C shown by dotted lines in Figures l, 5, and 7- v' work against the rotary cutter C for cuttingthe blank A to the desired cana form, it'

being understood that the cutter C extends;

parallel with the axis of the sleeve- -7 at one side thereof and that the carriage isadjustable along the guide way -2- atright angles to said axis to conformto blanks of different diameters and also to effect the cutting of the blank tothe desired canrform as will be hereinafter more fully explained.

The lower side of the carriage -3- is provided with a lengthwise groove or guider way 18.- parallel with the axis ofy thework holder for receiving a sliding memf ber or nut 19- and a screw sha-ft "20e which is journaled in suitable bearings -21- on opposite sides of the carriage -3- or at opposite ends ofv the guidey way l8 so that the screw portion of the shaft' may extend approximately the full` length of the groovel or guide way parallel with the axis of the. workholder.

The end of the screw shaft -20- ad. jacent the work is reduced and providedA with a collar -22- secured thereto and engaging the outer face of the adjacentbearing -21- to hold the screw shaft against endwise movement iny one direction, the other end'of the screw shaft being provided with a gear Q3- secured thereonby a nut *24- and engaging the outer face of. the adjacent bearing -21- to hold the screw shaft against endwise movement in the opposite direction.

For convenience of assembling, the bearings -21- are removably mounted upon the opposite ends of the carriage -3- and are held against rotation by pins *25*- entering corresponding sockets in the adjacent ends of the carriage as shown in Figure 2.

The central portion of the guide way -2- is preferably cut away to form a. re-l cess in the upper side of the base 1fbelow the open lower side of the groove or, guide way -18- for receiving a circular. turret 26 which is adjustable rotarily about the axis of a vertical coaxialv cla-mp,- ing bolt -27- and is provided in its upper side with a diametrica-lly extending groove or guideV way --28- for receiving an ex.- tension -29- of the sliding member or nut 19- which is engaged in andy operated lengthwise of the` grooves or guide ways -18- and -28- by the screw shaft -20- as,t the latter is rotated in one direction or the other.

The upper end of the clamping bolt -27-- is enlarged at -30- and engaged in a corresponding socket in the turret -26- below the groove or guide way -28- said bolt beingspl'ined by a pin -31- in its opening in the baser-plate. -1-- to move axially and has its lower end threaded and engaged by a nut -32- which inturn engages thev lower face of the base -1- for tightening and; releasing the turret -26-.

As previously stated the turret 2G- is adjustable rotarily which permits its groove or guide way 28- to be adjusted into parallelism with or at different angles relatively to the guide way -18- and axes of the screwv shaft -QO and work holder.

The turret 2G- is provided with peripheral' graduations B3- extending in opposite directions from a. zero position for registration with a fixed index --F on the adjacent portion of the base -1- to indicate theamount of throw which it is desired tovimpart to the cam by simply adjusting the turret to the desired angle, the turret being in its neutral position with its groove or guide way -28- parallel with the axis of the Work'holder when the zero graduation is registered with,A the fixed mark 3ft-a A driveshaft--S- is journaled in suitable bearings 8G- on the carriage 3- to be Operated by a handle -37 or other suitable operating means and is provided with; aworm "38.- and a gear -39- meshing respectively with the worm gear --9-- and the gear v523-- for simultaneously or synchronously. rotating the work holder 77+- andf screw shaft -20-.

The axis of. rotation of the turret Q6- is disposed in the vertical plane of the axis of the work holder -7- and screw shaft 20-.- and is therefore radial to those parts while the guide groove -28- is diametrieal and permits the nut -19- to slide therein the entire length thereof.

In Figures l, 2 and 6, the turret is shown as adjusted to its neutral or zero position with its guide groove w28-parallel and coincident with the guide groove n-l8- while the nut or sliding member -19 is shown initsmiddle position or directly over the axis of the turret. and therefore it follows that any movement of the nut by the rotation of the. screw would not effect the position ofthe carriage or work holder relatively to the cutter.

Onz the other hand in Figure 7, the turret is shown as adjusted rotarily a definite amount tolbring its guide groove 2S- at av predetermined angle relatively to the guide groove 18- and axes of the screw shaft -KQO- and sleeve -7- of the work holder under which conditions it is evident that if the nut -19- is moved endwise by the rotation of the screw M20, the movement of the extension -29- of the nut in the guide groove -28- Will impart a certain amount of movement to the carriage -3- along the Ways -2- and therefore, transversely of or radial to the axes of the Screw shaft -20- and sleeve -7- of the Work holder, the amount of said transverse movement for a given movement of the nut being proportionate to the angle at which the guide groove 28- is adjusted in either direction from its zero position.

The ratios of the gears -8- and -38-, and -23- and- 39- and also the pitch of the screw 20- are made to cause the nut -19- to travel approximately the entire length of the guide groove -28- at each revolution of the Work holder so that in cutting the blank A to the desired form or cam throw, the nut --19- is first adjusted to one end of the groove -28- While the cutter C Will be adjusted by any suitable means to bring its cutting edge into engagement With the periphery of the blank, Whereupon by rotating the shaft *35* through the medium of its handle -37 will cause the nut -19- to travel along the diagonally disposed guide groove --28- and thereby produce a corresponding movement of the carriage 3u along its Ways -2- for gradually feeding the Work against the cutter during one revolution which under ordinary conditions is suflicient to generate the desired cam surface.

It is evident, however, that if the cut is too deep to be made by the cutter through one revolution of the Work holder the cutter may be set up a trifle at the end of' each revolution and the direction of mot-ion of the nut 19- reversed by simply reversing the direction of rotation of the drive shaft -35-- The operation of my invention will now be readily understood upon reference to the foregoing description and the accompanying drawing, but it is evident that certain changes may be made in the detail construction and operation Without departing from the spirit of this invention and therefore, I do not Wish to limit myself to the precise construction shown and described.

I claim:

1. A cam forming machine comprising, in combination with a cutter, a support having a guideway, a carriage movable along the (ruideway, a rotary Work-holder journaled on the carriage transverse-ly of the guidevvay, a guide member adjustable on the support to different angles relatively to the axis of the Work holder, a slide movable on the carriage parallel With said axis and in sliding engagement With said guide member, means for rotating the Work-holder, and means for moving the slide as the Workholder is rotated.

2. A cam forming machine ycomprising in combination With a cutter, relatively movable elements having guide Ways one of which is adjust-able to different angles relatively to the other, a slide movable along both guide Ways to cause a relative movement of said elements, and a rotary Work holder mounted on one of said elements.

3. A cam formingmachine comprising in combination, with a cutter, a rotary Workholder, a carriage for the Work-holder movable transversely of the axis thereof and provided with a guideway parallel With said axis, an additional guide Way adapted to be set at an angle to the iirst named guideway and a slide movable in both guideWays.

l. A cam forming machine comprising, in combination with a cutter, a rotary Workholder, a carriage for the Work-holder, a guideWay for the carriage at right angles to the axis of the Work-holder, a guideway on the carriage parallel with said axis, an adjustable guide Way movable to different angles relatively to the first and second named guideways, a slide movable in the Second and third named guideways, means including a drive-shaft for rotating the Work holder, and means actuated by the drive-shaft for moving the slide.

5. A cam forming machine comprising in combination With a rotary cutter, a rotary work-holder parallel With the aXis of the cutter, a carriage for the Work-holder, a guideWay parallel with said aXis, a guide- Way for the carriage at a right angle to said axis, a turret having a guidevvay adjustable to different angles relatively to the first and second named guideivays, means for holding the turret in its adjusted position, a nut slidable in the first and third named guide- Ways, a screw for operating said nut, a drive shaft on the carriage, means for transmitting motion from the drive shaft to the Work-holder, and means for transmitting motion from the drive shaft to the screw.

In Witness whereof I have hereunto set my hand this 4th day of November 1922.

ELMER C. COOLEY.

Witnesses I-I. E. CHASE, Rrra CAMPoLnrro. 

